let the dust settleの意味は?

名探偵シャーロック・ホームズを現代のイギリスに蘇らせたBBCのテレビドラマ『Sherlock』を観ながら、ETC英会話のトニー先生のレッスンを受けています。

今日はlet the dust settleという表現について説明をしていただきました。

If you clean the house or you sweeping, there is dust in the air.
And then maybe before you ask the family come back in, otherwise they will breathe the dust, wait until the dust has settled.
But now we use that phrase for waiting till things have calm down, like if we had arguments.
We should probably stay away from each other, until the dust has settled.
And then they continue our conversation.

So there is a Christmas party.
And all the family will be there.
And there was a big argument.
And you said “oh, I am thinking I am going to see my mother, mother in law, or my mother this week.
You really you are going there.
Now shouldn’t you let the dust settled before you go there.
So you use it for the situation has happened.
You are now situation just kind of fade away into the background a little bit.
So you can use that for that kind of thing.
Or maybe you cause troubles in the bar last night.
You cause the big, probably you want to go tonight.
“No, no, no. You should let the dust settle before you go back again”.
“You made all the dust flies. You shouldn’t go back again until all the dust has come down!.

sweep
掃除する，掃く.

breathe 
〈…を〉吸う，呼吸する.

calm down
興奮状態のあとに、静か、または穏やかに成る

let the dust settle
事態［状況］を落ち着かせる.

■出演
・ETCマンツーマン英会話トニー先生(荻窪/富士見ヶ丘)

■聞き手
・青樹洋文

◆使用楽曲 (BGM)
“Movie Star * (The Making Of X) by Loveshadow

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